The Iguanas - Mona / I don't know why 7"

Anyone know what year it is the single by The Iguanas, with the label identical to the original edition of 1965 (Forte/AR201) but with the number of matrix ZTSC121007/8 scratched on vinyl, not printed?

The only clue I've found is that it's from the 80's, but I would like to know the exact year